The End of Technology

Before today, Ning Zi had seen girls cry. Ning Xiao and Ning Yulin both cried in front of him.

But this was really the first time he saw her. His eyes were obviously misty and tears were already welling up in his eyes. He could still hold back the tears.

Well, you are worthy of being a strong sister.

Ning Zi gave Lu Xiaoya a thumbs up from the bottom of her heart and was about to help her pick up the graphics card that fell to the ground. The girl had already bent down and picked up the graphics card.

"Let's go, by the way, I wish you a prize." Lu Xiaoya waved her hand grandly and said.

"Meow..." Before Ning Zi could reply, the two parted ways, and the kitten on one side meowed weakly first.

"Hey, what a cute kitten..."

Lu Xiaoya looked over in surprise, saw March, and squatted down again. First, she stretched out her hand to tentatively touch the kitten's head, and found that March narrowed her eyes, looking like she was enjoying herself, and was not aggressive at all. , simply threw the graphics card to the ground again, and held the kitten in his arms: "Kitten, have you lost your way with your owner? I'll take you to find your owner, okay? Or you can just leave with me. …”

Ning Zi looked at March in Lu Xiaoya's arms. The cat was pressing its head on the girl's chest in a mean manner. Ning Zi immediately looked away and explained helplessly: "This is my cat. .”

"Huh? A person like you actually keeps a cat?"

Ning Zi narrowed her eyes and asked, "What kind of person am I?"

"Uh, forget it... then, little cat, you have to be good, I'm leaving first."

"Meow..." The kitten jumped out of the girl's arms, and its small claws just grabbed the outer box of the graphics card. The small claws, which didn't look sharp, just tore a crack in the packaging box.

"Ah..." Lu Xiaoya was a little bored, but she just breathed softly, and then picked up the graphics card that she wanted to smash directly. If she hadn't spent nearly three thousand yuan to buy this piece of crap, she would have stopped dealing with that unscrupulous merchant.

Lu Xiaoya didn't blame March. After all, a cat would definitely not know what it was. She was just a little annoyed because the unscrupulous merchant had another reason not to exchange the product for her.

But in Ning Zi's eyes, March's operation can no longer be said to be a hint, it is simply an explicit statement...

"Is there something wrong with this graphics card?" Ning Zi asked.

After hearing this question, the girl's suppressed emotions came to the fore again.

Thinking of the sarcastic remarks she had just made while arguing with the merchant, she couldn't help but shed tears at lightning speed.

All right……

This time Ning Zi bent down first, picked up the broken graphics card, and asked, "What's going on? Is the graphics card broken?"

Lu Xiaoya stood there silently, nodded first, and then shook her head.

Ning Zi thought for a while and said: "So the graphics card is indeed broken, but you are not angry because the graphics card is broken?"

Lu Xiaoya didn't say anything but nodded slightly.

Ning Zi finally broke through.

Really, it would be fine if Lu Xiaoya just cried. If you can't afford to offend, you can always hide.

But what he fears most is that Lu Xiaoya is like this now. She is obviously very stubborn and wants to stop her tears without making a sound, but the tears keep dripping down. It's very similar to what Ning Xiao looked like when he was a child and couldn't bear it after being wronged.

At that time, Ning Zi thought that when he grew up, whoever dared to provoke Ning Xiao would make him look good.

But when I got older, I realized that fists couldn't solve any problems at all.

And now it seems that no one will take the initiative to provoke this cousin.

Then he met Lu Xiaoya who suddenly had an emotional breakdown.

Yes, this performance accidentally aroused Ning Zi's protective desire.

Ning Zi looked at the damaged outer packaging of the graphics card and simply opened it, then asked: "New one?"

"Um……"

"Just bought it not long ago?"

"No, it's been more than a month."

"Give me your phone and I'll take a look at your chat history with the merchant."

"No!"

"Believe it or not, I can check the complete record even if you don't show it to me?"

"Ah? Are you still a hacker?" Lu Xiaoya couldn't help but feel sad after hearing this, and looked at Ning Zi in surprise. She had admired hackers when she was a child, but she had never seen a living hacker.

Ning Jie didn't say a word, but stretched out her hand towards Lu Xiaoya.

Well, it feels more and more like his cousin, because Ning Xiao is the same. Even when she is saddest, if something happens that she is particularly interested in, she will quickly change her attention.

Probably because Ning Zi really had the aura of a superior person now, Lu Xiaoya finally chose to honestly call up the chat history with the merchant, and then handed over the phone.

After casually flipping through it, Ning Zi probably understood the reason why Lu Xiaoya was not feeling right.

"Dear, you bought it more than a month ago. The problem may be caused by improper use. It would be too much to accuse us of not being genuine."

"Dear, do you believe this? Who among ordinary consumers would buy a graphics card and keep it for a month? Isn't your colleague deliberately trying to hack us? And look through the chat history and see what you said before placing the order. Did you buy it? I want to give it to my classmates! Please, can you be more reliable in making up lies? You bought a computer to give to your classmates and you brought it back to us in a month?"

"Dear, this is your fault. Others say that a mining card is a mining card? I told you before placing the order that this is a regular tooling graphics card. Besides, you took more than a month to test and return it. We We can also suspect that you were transferred in the middle? Who can say the best nowadays? "

"Dear, if you are just short of money, why don't you just say it? How about I send you a red envelope of 100 yuan, so you can stop messing around?"

After reading it, Ning Zi took a screenshot of Lu Xiaoya's chat with the merchant, then called up WeChat and sent it to herself.

…

Well, the seller's customer service had such a weird tone that Ning Zi got a little angry. But he subconsciously asked: "Which classmate are you buying this computer for?"

"ah?"

Lu Xiaoya looked up at Ning Zi, bit her lip, and suddenly realized that she was not very good at lying, so she simply said: "I originally planned to give it to you, but don't overthink it. I'm thanking you for helping me order it before. That M10 pro that I bought at that time had to cost an additional 10,000 yuan. I just didn’t want to take advantage of you. But now I have changed my mind and don’t want to give it to you.”

This answer was something Ning Zi didn't expect. After all, he really didn't know that there would be an additional price increase when he wanted to buy the M10 Pro.

But when he heard that the computer the girl had been saving for a year was supposed to be given to him, his mood suddenly became good. After all, except for his cousin, he has never received any gift from the opposite sex in his life.

So Ning Zi asked: "Why?"

Lu Xiaoya looked at Ning Jie in confusion and asked, "Why?"

Ning Zi pointed at the graphics card and said, "I changed my mind. I don't want to give the computer to me. Is it because the graphics card is broken?"

Lu Xiaoya subconsciously replied: "Of course not. Because the Internet says you are the richest man in the world, how can you still lack a computer?"

Ning Zi was silent for about five seconds, then looked at Lu Xiaoya seriously and said, "There is still one missing. You don't have to send the graphics card back. I'll accompany you to the dormitory to move the computer first."

"I..." Lu Xiaoya subconsciously raised her hand and scratched her head, and asked, "Are you serious?"

"Unless you said it was a lie that you planned to give it to me! Also, don't always believe what is said on the Internet. The Internet also said that Ma Zhengyun had 150 billion to distribute 100 million to each of the 1.4 billion Chinese people. He still has 148.6 billion left. Do you believe that? ?"

"Um? That's fine, but I don't want to take advantage of the graphics card seller, and they might even cheat others!"

"Don't worry, I guarantee they won't be able to trick anyone else."

"Are you using hacking technology? Can you let me see what you do?"

Ning Zi glanced at the girl and said, "The crime of damaging computer systems is written in the criminal law."

Lu Xiaoya pouted and said, "Don't worry, I won't betray you."

Ning Zi shook his head and said, "I will use legal means to make them realize their mistake."

"Oh... let's go then." Lu Xiaoya nodded, glanced at the graphics card in Ning Zi's hand, squatted down and hugged Sanyue.

"Yeah!" Ning Zi nodded, and then walked beside Lu Xiaoya.

"What's the cat's name?"

"March."

"Oh, it's Xiao Sanyue."

…

When they took steps forward, both of them fell silent.

Ning Zi didn't have much experience in dealing with the opposite sex, and of course Lu Xiaoya didn't either.

If it was just on her mobile phone, Lu Xiaoya could still post the emoticons she had saved for many years, but when she was walking around the campus like this, she didn't know what to say. I just secretly complained in my heart about why I really cried in front of this guy just now...it was so embarrassing.

When she reached a fork in the road, Ning Zi couldn't help but ask, "I remember which way your dormitory should go."

Lu Xiaoya replied: "I don't live in the dormitory, I moved outside the school."

"Oh? Don't you get along with your roommate?" Ning Zi asked subconsciously.

"Absolutely." Lu Xiaoya nodded.

Ning Zi nodded.

In fact, he didn't get along well with his roommates when he was in Huaqing. It's just that at that time, he didn't have the conditions to be willful enough to rent a house. Looking back now, if he could have rented a house near Huaqing at that time, he probably would not have encountered so many messy things.

There's nothing to say.

The two walked silently on the sidewalk.

Fortunately, it was already class time and there were not many people on the road.

But neither of them noticed that a group of school leaders in the distance were walking towards each other from the other side of the avenue, preparing to return to the administration building.

A celebration banquet was originally prepared, but neither of the two principals showed up, which somewhat hurt everyone's enthusiasm. We went to have some lunch after we had ordered it, and we happened to meet each other when we came back.

"Ahem, Principal Chen, that seems to be Ning Zi, right?" A vice principal pointed at the two people not far away.

Chen Yonggang, who was talking to another vice-principal next to him, looked up and saw two young figures walking side by side under the shade of a tree. Then he recognized both of them and suddenly said: "No wonder he doesn't want to talk to us old guys. We had dinner together, it turned out that we were rushing back for a date."

"I made a mistake at work. I should have informed classmate Lu if I had known earlier. Do you want to invite them to have dinner together?" The director in charge of the celebration immediately admitted his mistake.

"Haha, Lao Liu, that's enough for you. Come on, let's not worry about the young people's affairs. Young people can't let go of old guys like us. Let's go, let's go." Chen Yonggang said very wisely said.

…

Ning Zi soon discovered that something was wrong.

Because the path he followed Lu Xiaoya was exactly the path he was originally going to take.

"You won't just rent in the teaching and staff community, right?"

"Yeah. It's okay. Although there are people standing guard there now, the uncle guarding the door is very nice. Just tell him and he will take you in."

To be honest, Ning Zi was not sure whether the gatekeeper Lu Xiaoya mentioned was his father. After all, Lao Ning is not the only middle-aged uncle guarding the gate.

But according to the message Ning's father just sent back on WeChat, at least his father must be on duty during the day today. In Ning's father's words, the concierge job can't be done for more than a few days, so it would be nice to be able to help out more now.

Well, after getting this answer, Ning Zi nodded and agreed.

As we approached the school gate, we could see more students.

There is no other way. The street across from the faculty community is the busiest place near the school, with many businesses. This is the closest school gate to that street. If teachers hadn't been coming in and out of this door so often, there might have been more students.

Naturally, celebrities like Ning Zi are often recognized.

Fortunately, neither of them really cared.

Ning Zi has a clear conscience, while Lu Xiaoya has long been used to it. After all, she has already completed the entire process from falling in love to being dumped in other people's mouths. Anyway, she had already completely given up the idea of ​​having a boyfriend at school, so whatever.

Anyway, no one can control what the public says.

Moreover, Lu Xiaoya felt that she was walking upright and sitting upright. Even if the two of them were walking together, there would still be at least half a meter of safe distance between them. Anyone who was not blind should be able to see the sense of separation.

In this way, Lu Xiaoya, who was confident and confident, quickly brought Ning Zi to the gate of the faculty and staff community of the University of Physical Education. Ning Zi could see Lao Ning looking outside through the glass of the concierge.

Ning Zi knew that Lao Ning was waiting for him, because he mentioned in WeChat that he would come right away.

Just when the father and son's eyes met, Lu Xiaoya had already jogged two steps, walked to the doorman's window that was not closed, and said sweetly: "Uncle, please remember me, I live there. Today I I invited a classmate, here he is to help me move my computer, do I need to register first?"

Lao Ning raised his head and glanced at Ning Zi, and then took a closer look at Lu Xiaoya's pretty little face. His own face was filled with joy and he said, "Forget it, just register your name and ID card." The number and phone number, as well as the specific room number where you live, and the most important thing is to clearly indicate that the computer you want to move is the computer.”

"Okay, thank you, uncle." Lu Xiaoya responded, then turned around and handed the cat in her arms to Ning Zi behind her. Then she began to write in earnest on the registration book handed over by Lao Ning. Actively register.

This really isn't Lao Ning making things difficult for others.

The requirements of this position are like this. If you want to move large items through the gate, you must register first. Lao Ning can only be considered selfless at best.

Ning Zi glanced at Old Ning, who was so happy that he couldn't find Bei and kept winking at him, but didn't express anything. He just refused to make eye contact with Lao Ning and looked elsewhere. In order to avoid Lu Xiaoya being embarrassed again, he did not greet Lao Ning directly.

Soon the girl completed the registration, and Lao Ning waved his hand and said: "Go in, go in, don't be in a hurry, you can finish the registration within today, just move slowly, it will be fine."

"Oh, thank you, uncle." Lu Xiaoya couldn't figure out why it took a whole day to move a computer, and she didn't quite understand why the uncle was so enthusiastic today, but she still said thank you, and then turned around naturally, and left. Ning Ju next to her took March in her hands and held it in her arms.

Ning Zi glanced at Lao Ning, and then followed Lu Xiaoya into the community.

It wasn't until he turned the first intersection that Ning Zi suddenly said, "The uncle who registered you just now - he's my dad."

"Well, it's pretty good...ah? What did you say?"

"You heard me right."

Lu Xiaoya was stunned and stood there, unable to react for a long time.

This was a bit too much. She didn't even think that Ning Zi's father would work as a security guard at the school's faculty and staff community.

At this moment, as she was recalling what the uncle said just now, Lu Xiaoya's face turned red instantly...

"No, why is your father here?"

"My family used to live in Luoyu County, which was quite poor. Moreover, my father's hometown was also a sad place, so one of my requirements for coming to the Physical Education University to study mathematics was that I could bring him and my cousin to the capital. My cousin was It was arranged to be in the library of the Mathematics Research Center of Yanbei University, and my dad chose this place. But it won’t last long, and it will be transferred probably next week.” Ning Zi explained casually.

Lu Xiaoya knew some things about Ning Zi's past.

After all, Ning Zi’s history of dropping out of Huaqing has been scrolled through the Internet countless times.

Until now, on the official Weibo of Huaqing University, some netizens rushed in and ridiculed in the comment area, "I heard that Huaqing gave up a Turing Award winner, a Fields Medal winner, and an invisible richest man in the world. Who are you?" Are you serious?"

But after all, I don’t know much.

It was at this time that I heard some more insider information. It turns out that you can still support your family while studying in college?

"You're so awesome." Lu Xiaoya praised sincerely, and then couldn't help but ask: "Ning Zi, did you drop out of Huaqing on purpose?"

Ning Zi didn't answer, just glanced at the cat in the girl's arms.

The kitten squinted its eyes with a look of enjoyment.

"I don't want to answer this question." Ning Zi shook his head.

"Oh, then it seems that what is said on the Internet is true. Next time you meet that kind of self-indulgent woman, you can ask me for help. I tell you that I have a good way of dealing with such women. I used to be in high school. At that time, there was a classmate in the class who was very arrogant and talked bad about me everywhere. Later he would avoid me when he saw me." Lu Xiaoya said brightly.

"Did you hit her?" Ning Zi asked casually.

Lu Xiaoya shook her head and said, "No, I beat up several of her boyfriends. Just when she talks about one, I will beat up one of them."

The corner of Ning Zi's mouth twitched subconsciously, and she looked up and down at the small body of the girl next to her, with a look of doubt on her face.

Although he believed that there were women with strong fighting abilities, such as Zhai Qiuxian, the strength of that woman could really be seen with his eyes. As for Lu Xiaoya...

"Hey, what's your expression like? I told you that I have been practicing free fighting since I was a child. And my dad also taught me a lot of anti-joint and elbow techniques that are banned because they are too lethal. You don't want to look down on others. "

Ning Jie is silent.

"Heh... you hold Xiao Sanyue, and I'll show you." Lu Xiaoya handed over the kitten in her arms.

Ning Zi was stunned for a moment, then subconsciously picked up March.

Without the kitten in her hand, the girl suddenly looked solemn, looked around, then looked in one direction, trotted two steps, then jumped up, easily somersaulted, and jumped into the road next to the community. In the green area, before Ning Zi could react, he landed with a whip kick directly towards a small tree that was about two times thicker than a baseball bat...

This leg obviously didn't have much strength, causing the trunk of the poor little tree to tilt to the other side. Then he retracted his leg. When the little tree bounced back, a wrong step was followed by a direct elbow strike.

Ning Zi heard the slight rustling of leaves and a "click" hidden in the sound. Although the small tree was not broken, she could see a crack in the middle...

Before Ning Zi could sigh, a shout suddenly came from the other side of the community: "Hey, hey, what are you doing? Little girl, is this tree trying to offend you? Whose child are you? Stop!"

The girl who was so brave just now was stunned for a moment, then quickly jumped out of the green belt, and then stood obediently on the side of the road.

The next moment, a middle-aged woman walked up the side path.

"You...uh, Ning Zi?"

"Well, I'm sorry, teacher, my friend just got a little excited. I'm really sorry. I'll find someone to check the tree later. If there's a problem, I'll plant a new one. I promise she won't do it next time. ." Ning Zi bowed slightly, and then apologized.

The attitude is very sincere, and of course it does have something to do with him.

If his disbelief hadn't been too obvious, Lu Xiaoya probably wouldn't have thought of proving herself in this way.

"Oh, it's okay, it's okay."

The middle-aged woman smiled and said to Ning Zi, then looked at Lu Xiaoya and said, "You are just a little girl. It is a small thing to kick a tree when you lose your temper, but you must not kick someone like this? You have been practicing since you were a child. Right? Are you majoring in competitive sports training or martial arts?"

"Martial arts major." Lu Xiaoya answered quietly.

"No wonder. Okay, then you guys go about your business first. Young people should stop quarreling if they have nothing to do." The middle-aged woman explained to the two of them again, then turned and walked away.

Lu Xiaoya then stuck out her tongue, shrank her neck, and returned to Ning Zi with a grimace.

"I admit that you are very powerful, let's go." Ning Zi said seriously.

"Not as powerful as you, but fortunately you are here, otherwise I would be miserable." Lu Xiaoya said with lingering fear.

She knew the fighting power of the middle-aged women in the community.

After all, this is the faculty and staff community of Ti University, and most of the residents are teachers and employees of Ti University. It's so long-winded that I could hold her there and lecture her for an hour. She might even have to call the counselor...

"It's okay. If you get into trouble in school from now on, just call me by name." Ning Zi said.

"ah?"

"I probably won't have the chance to cause minor troubles that only students will encounter in the future. You can help me experience another kind of student life." Ning Zi explained.

This time, Lu Xiaoya was stunned by Ning Zi's obviously abnormal thinking pattern.

"Then you keep your word."

"I always keep my word."

"La...forget it, it's too childish!"

"Pull the hook!"

…

Ning Zi found that if she ignored classmate Lu Xiaoya's figure and appearance, she could treat the little girl as a man.

For example, when he came to the one-bedroom apartment where Lu Xiaoya rented, he watched Xiaoya quickly pack up the monitor and computer case. People who rarely send express delivery definitely don't have such quick skills.

Originally, Lu Xiaoya planned to carry the monitor and case directly to Ning Zi alone.

But Ning Zi was still embarrassed to let a girl take on all the heavy lifting.

So Ning Zi was carrying the monitor, while Lu Xiaoya was holding the computer case in one hand and the kitten in the other.

The relaxed look made Ning Zi suddenly become interested in biology and sports science. She mainly wanted to study why a body that didn't look strong could contain a lot of strength.

…

After moving the computer to Ning Sheng's room in the administration building, Lu Xiaoya said she had classes in the afternoon and quickly left.

Ning Zi left March in the room and walked out of the door again.

Although I met my father just now, there was no communication after all.

Arriving at the door of the faculty community again, this time Lao Ning had already walked out of the concierge. The father and son were still not so particular and started walking along the street, then simply sat down on the curb.

No way, I'm used to it. Ning Zi still remembers that when he was a child, his father took him to visit the county town. When he was tired, he would just find a place to sit and be friendly.

"I heard that this time you went out, not only won a prize, but also did something big?"

"It's not a big deal. It's just that I can get back something that belongs to me."

"Tsk, tsk, tsk, you've made your mark, but now your tone of voice is different. Leader Luo said you are now the richest man in the world."

"That money has other uses, and it will be spent like water. The news will explain it to me in the next few days. The money will be invested in doing some more important things, but the little leftover is indeed enough for our family to spend a few dollars. For life."

"What should I do? I'm not ready yet... Do I have to watch TV and learn how rich people live, so as not to embarrass you if I go out in the future?"

"Oh, then you can teach me how to take the time to teach me. I'm not very good at living the life of a rich person."

Ning Zi responded casually, then took out an ICBC bank card from his pocket, handed it over, and said: "This is the bonus I got this time, and some of the previous rewards have been exchanged for me. There are more than 10 million RMB in it, you should take it and learn."

Lao Ning took the bank card handed over by Ning Zi and said with emotion: "More than 10 million. I probably won't be able to earn that much in my lifetime as a contractor, right?"

"If you didn't work so hard for me to study, we wouldn't be able to earn that much even if we worked as water pipes together for the rest of our lives."

"What happened to that little girl today?"

"a friend."

"Are you a girlfriend or a friend?"

"have no idea."

"What do you mean you don't know?"

"We are still friends for now. I don't know if we will develop into a girlfriend in the future."

"I think it's pretty good. I've been in and out in the past six months. I'm very polite, have a good tutor, and look attractive. And I've never come back with any shady people. I don't remember that I've never been there at night. Been out."

“Aren’t all college students like this?”

"Who can say? There are several students from your school renting in the community. They often take taxis back in the middle of the night on weekends and are still drunk. The smell of alcohol can be smelled from a distance. You need to find someone like that. I do not like."

"Don't you like drinking?"

"I also like to eat pork. Do you want to live with a pig in the future?"

"Don't talk about this."

"Why don't we talk? Baby, you are so cold sometimes. Your sister and I are worried that you won't find a partner in your life. If it's okay, we should settle it as soon as possible. I know that you young people nowadays have different ideas than us. It’s the same. There are a bunch of new words, such as single aristocrats and DINK families. But people, you can’t be too selfish in your life. Leaving more or less offspring is a major matter related to the reproduction of the entire human race. Well, before That’s what they say in the animal world.”

Ning Zi: "..."

"Yes, I know you don't like to hear it. When you are done with your recent work, go to your uncle's place for a meal. Set a time and tell me, and I will let your uncle prepare it."

"Okay. By the way, Sister Xiao is in love. She is a mathematics professor at Yanbei University."

"The relationship is great, does your uncle know?"

"How do I know?"

"You should know that professor, right? How is he?"

"good."

"Then I have to tell your uncle the good news. Why don't we ask Ning Xiao to take him back next time so we can meet him too."

"You've seen him before. On the first day he came to the capital to have the Fengfeng Banquet, he sat diagonally across from you. His name was Fang Xu."

"Uh?" Lao Ning frowned in thought, then shook his head: "I don't really remember."

"Well, then you'll remember when I see you again."

"Okay, go ahead and get busy."

"good!"

…

Rio de Janeiro, Brazil.

The noise outside the door woke up Fang Xu, who had just fallen asleep. He picked up his phone and looked at the time. It was already 11:30 pm.

Regarding the fact that the hotel room was not soundproofed, Fang Xu only felt powerless to complain.

But I heard that higher-end rooms are soundproofed.

I was about to go to the toilet and continue to rest when I suddenly saw an unread email message on my phone. The key was that the other party’s email was very familiar.

Ning Zi’s email?

Fang Xu immediately sobered up.

I subconsciously clicked on the mailbox, then froze.

Fang Xu was confused when he saw the sentence "I will agree with you and my cousin if we finish this topic."

how to say?

It probably feels like I'm back before the college entrance examination.

At that time, the teachers said the same thing. If you work hard to get a certain score, you can go to Huaqing or Yanbei.

He never expected that he would have to face this kind of assessment even though he was already a professor at Yanbei University. I always feel a sense of ridiculousness.

So Fang Xu subconsciously downloaded the questions given by Ning Zi to his mobile phone.

After clicking it and taking a look, my mind became even more confused. What Ning Zi gave was a number theory question.

"If A is an infinite subset of positive integers and the reciprocals of all numbers in A sum to diverge, then A contains an arithmetic sequence of any length."

Well, the description of the problem is very simple, and the explanation is not difficult, because the sum of the reciprocals of all natural numbers is divergent.

But the moment Fang Xu saw this question, he was completely confused.

He didn't even know whether Ning Zi thought highly of him or planned to separate him and Ning Xiao.

Because the correct description of this problem is called Erdős reciprocal and conjecture, it is a well-known problem in the number theory world and is still a Fields Medal-level problem. It is the same as the Navis-Tokes equation. As long as it is proved and recognized by the academic community, you can immediately win the Fields Medal.

To put it bluntly, this is much more difficult than the college entrance examination questions. It belongs to the kind of people who can start thinking about arguments after mastering advanced mathematics. The threshold seems not high, but it has not been proven after so many years.

The only advance currently is to prove that primes and reciprocals diverge and include arithmetic sequences of arbitrary lengths. However, the previous proof method is extremely special and cannot be generalized to ordinary situations. Therefore, this is still a number theory problem where the lower limit of research is not high, but the upper limit of difficulty is too high.

Really, Fang Xu felt for a moment that Ning Zi was joking with him.

Because if you devote your main energy to the research of this kind of hierarchical problem, the biggest possibility is that after many years of research, you will waste your youth and have nothing.

Yes, one question made Fang Xu wake up and there was no trace of sleepiness at all.

After sitting on the bed for a while, the sound of conversation came from the corridor again.

Fang Xu could hear Fan Zhenhua's voice saying goodbye politely.

It can be seen that today's gathering of the big guys has been chatting for a long time. It has been five and a half hours from 6 pm to 11:30 now.

Finally, the sounds outside quieted down. Fang Xu was about to go out and take a look when he heard a gentle knock on the door.

"Xiao Fang, are you asleep?"

"Not yet, it's coming."

Fang Xu, who was at the door of the room, opened the door, and then saw Fan Zhenhua standing at the door with a serious face: "Xiao Fang, you clean up today. We will return to China tomorrow. We can't stay in this meeting."

"Okay, Academician Fan." Fang Xu agreed, not feeling surprised.

He could probably figure out what happened.

Not many people knew that Fang Xu was in love with Ning Xiao. Even a small person like him could be specially sought out to corrupt him. You can imagine how big the two big bosses would be. Not to mention that from their standpoint, many times it’s not even about money.

Some favors are really annoying.

"Okay, that's it."

"Forehead……"

"Why, is there anything else?" Seeing Fang Xu hesitate to speak, Fan Zhenhua asked.

"Ning Zi just sent me an email, probably arranging a research topic for me."

"Research topic? What topic."

"Erdesh Countdown and Guess."

"Ahem..." Fan Zhenhua coughed violently.

But when he looked at Fang Xu, he obviously had a lot of emotions: "It's a good thing. Remember, when you go to the National Physical Education University next year, work hard and don't let the teaching tasks fall behind. But this project will still stay at our Yanbei International Mathematics Research Center. ah."

"No, Mr. Fan..."

"Don't worry, Ning Zi has specially arranged this topic for you. There is a high probability that I believe you can solve it. Think about Ning's cutting method, do you understand? Do it well, and maybe there will be a second Phil in China in four years. This is the winner of the award." Fan Zhenhua raised his hand and patted Fang Xu on the shoulder.

Fang Xu was stunned. He felt that Fan Zhenhua was too optimistic about this matter.

…

Yanbei Sports University, administrative building.

Ning Zi has returned to the room.

The computer given by Lu Xiaoya was put aside, and Ning Zi was checking the keywords in the content about Lu Xiaoya's theory with the merchant on the Internet.

Such as mining cards, tooling graphics cards, etc...

Soon I roughly understood the cause and effect.

To put it simply, a virtual currency called Bitcoin is very valuable. As for why it is valuable, it is because it has extremely scarce properties, a fixed total number, and a technology called blockchain to protect it.

The so-called blockchain technology is so powerful because each block stores certain information. As long as there is one server working in the system, the entire blockchain is safe. These servers are called nodes; the other is To modify the information in the blockchain, you must obtain the consent of more than half of the nodes and modify the information in all nodes, so it seems very safe.

Described in more professional terms, data is difficult to tamper with and is decentralized.

At the same time, if you want to own this kind of Bitcoin, you need to use a mining machine to mine it.

The process of consuming a lot of power resources and using powerful GPU mining cards to perform calculations is called mining. Those cards used for mining are called mining cards. The so-called tooling graphics cards are actually probably graphics cards shipped directly from the manufacturer to the miner. Because the other party doesn't care much about packaging, they simply omit the packaging to save costs...

Of course, if the brand new tooling graphics card is similar to the graphics card sold to players, then the used mining card can look very new, but in fact, in order to maximize profits, mine owners often overclock and use GPUs for calculations, which is basically a hidden injury. Tired.

Mining disasters refer to the recent tragic decline of various virtual currencies, driven by the sharp fall of Bitcoin. Many miners have finally managed to mine out virtual currencies that cannot even be exchanged for electricity bills, so they reluctantly sell their most valuable graphics cards. Sell ​​it at a low price, flooding the market with a bunch of mining cards.

After roughly understanding the causes and consequences, Ning Zi felt a little emotional about the power of the Internet information cocoon.

Bitcoin has been popular for many times, but he didn't even know much about it.

But at the same time, he really didn’t think too clearly about the cognitive logic that many people believe that various virtual currencies based on Bitcoin have value.

Consuming so many resources to do something that makes no sense at all, and then giving it so-called cognitive value, even though many virtual currencies have been proven to be scams and have even trapped countless people, there are still people who are still happy to do it. Go in.

Even the Chinese official announced that this thing is not recognized, but it still cannot stop those believers.

Ning Zi found this matter very interesting.

How should I put it? The entire logic of the so-called virtual currency is based on the extremely secure nature of blockchain technology, which is recognized by everyone. No one can tamper with the Bitcoin wallet. So money is extremely safe.

In other words, if he can prove that the money is actually not safe at all and has a way to deceive more than half of the nodes in the chain at any time through the corresponding key, it also means that he can operate everyone's wallet at will. The value of this thing is gone.

This happens to be Mao Mao’s strong point, especially since this thing relies on the Internet. According to the current coverage of telecommunications network products such as Cisco, Samsung, Logia, etc. in those developed markets, he even has a way to make all regions The blockchain collapses once a day...

After thinking about it, Ning Zi decided to be polite first and then fight.

He took screenshots of Lu Xiaoya's conversation with the other party through WeChat, found the merchant on the platform, and then sent the screenshot to customer service. He typed a paragraph carefully and sent it: "Please follow the fake one in the advertisement on your product homepage." You will be fined ten yuan and the account in the picture above will be refunded ten yuan of brand new unopened genuine graphics cards of the same type, otherwise you will be responsible for all the consequences!"

Soon, the customer service responded, first with a question mark.

Then he asked humbly: "Dear, is there any serious illness in your brain?"

Well, after seeing this news, Ning Zi knew that March had won again.

After all, there is a lot of excitement here!